publication . Article . Research . Other literature type . Preprint . 2019

Dark Energy Surveyed Year 1 results: calibration of cluster mis-centring in the redMaPPer catalogues

S. Bhargava; Chris A. Collins; Peter Melchior; D. Brooks; Matt Hilton; W. G. Hartley; W. G. Hartley; Pablo Fosalba; E. Bertin; Arya Farahi; ...
Open Access English
  • Published: 01 Aug 2019
  • Publisher: Oxford University Press
Abstract
The center determination of a galaxy cluster from an optical cluster finding algorithm can be offset from theoretical prescriptions or $N$-body definitions of its host halo center. These offsets impact the recovered cluster statistics, affecting both richness measurements and the weak lensing shear profile around the clusters. This paper models the centering performance of the \RM~cluster finding algorithm using archival X-ray observations of \RM-selected clusters. Assuming the X-ray emission peaks as the fiducial halo centers, and through analyzing their offsets to the \RM~centers, we find that $\sim 75\pm 8 \%$ of the \RM~clusters are well centered and the mis...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: QB, X-rays: galaxies: clusters, dark energy, galaxies: clusters: general, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Space and Planetary Science, Astronomy and Astrophysics, galaxies: clusters: general, dark energy, X-rays: galaxies: clusters, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, European research, National laboratory, Christian ministry, Library science, Fundamental physics, Physics, European union, media_common.cataloged_instance, media_common, Astronomy observatory, Research council
Funded by
NSF| Collaborative Research: The Dark Energy Survey Data Management Operations
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1138766
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
EC| TESTDE
Project
TESTDE
Testing the Dark Energy Paradigm and Measuring Neutrino Mass with the Dark Energy Survey
  • Funder: European Commission (EC)
  • Project Code: 291329
  • Funding stream: FP7 | SP2 | ERC
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
,
RCUK| STFC Sussex 2015 DTP
Project
  • Funder: Research Council UK (RCUK)
  • Project Code: ST/N504452/1
  • Funding stream: STFC
,
EC| COGS
Project
COGS
Capitalizing on Gravitational Shear
  • Funder: European Commission (EC)
  • Project Code: 240672
  • Funding stream: FP7 | SP2 | ERC
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